Animated Simple CAPTCHA 1.0

Animated Simple CAPTCHA generates a random text that is stored in a session for posterior user validation. It renders a series of frames with the text obfuscated by animated letters, grids and optional random fonts.

The user can read the text when the animated frames are displayed but robots will have difficult to figure what the text is. The text submitted by the user can also be validated against the value stored previously in a session.